Numbers and Words

Across

1. Number after eighteen and before twenty

2. Three times over in total

6. Relating to medical care of children

7. Exact center of a line segment

10. Greek letter often used in math

11. Place for plays and performances

Down

3. School principal in charge of students

4. Turn liquid into vapor slowly

5. Convert words from one language to another

8. Number on a hand or foot

9. Number after six and before eight